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ADS8568: 芯片读取数据有偏执电压

Part Number: ADS8568

我把ADS8568的并行通信改为了串行通信,出现一下问题。

1 8路模拟信号通道上一直2.5V电压。

2 当采样电压超过2.5V时芯片采集出来数据图变大,与小于2.5V信号没有线性关系。